Pencil-sharpener.



S. A. DUNCAN.

PENCIL SHARPENER.

APPLICATION FILED JULY 26. I915.

1,204,959. Patented Nov. 14, 1916.

v 1'4 5 a v 311mm kjy/a/m ZZZ/260 UNITED STATES PATENT OFFICE.

'SYLENA A. DUNCAN, OF NESHANIC STATION, NEW JERSEY.

PENCIL-SHARPENER.

Specification of Letters Patent.

Patented Nov. 14, 1916.

Application filed July 26, 1915. Serial No. 42,042.

. able others skilled in the art to which it appertains to make and use the same.

This invention relates to pencil sharpeners and more particularly to that class wherein the cap supporting an eraser contains the.

sharpening elements.

An object of this invention is to provide a cap for the protection of the point of the pencil when carried in the pocket as well as a sharpening device for keeping the pencil pointed.

A further object of this invention is the provision of a pencil sharpener having a series of radially disposed cutting members which receive and cut the end of the pencil to expose the graphite and to provide a cushioning efl ect for the exposed lead within the cutter.

A further object of this invention is the provision of a series of cutters in the form of saw edges and to arrange said cutters in pairs having the teeth of said saw edges either to coincide or in staggered relation.

Further objects will be apparent from the following specification, appended claim and:

drawings in which,

Figure 1 is a perspective view of the device applied to a pencil, Fig. 2 is a vertical sectional view through the sharpener showing a pencil positioned to be sharpened, Fig. 3 is a slightly modified form similar to that shown in Fig. 2, Figs. 1 and 5 are cross sectional views through diiferent forms of the sharpening devices, and Fig. 6 is a perspective view of a part of the cutter detached.

This sharpener is adapted to serve as-a protective tip for a pencil where it is desired to carry the pencil in the pocket and it also serves as a support for the eraser. Confined in the shell of this tip is a series of cutters radially disposed to receive the point of a pencil therein so that rotary movement of the pencil with respect to the cutter or vice versa causes the cutting away of the wood of a pencil to expose the writing element.

Referring to the drawings, there is shown a pencil 10 having a cap mounted on one 1 end thereof, and this cap comprises a sleeve 11 for engagement with a pencil in either position to either support the cap upon the pencil or to direct the pencil in the cutting element. This sleeve has an enlarged shell 12 formed thereon which may be fluted as at 13 to form a grip for the sharpener and also 'to engage the surface of a'plug 14 which has an extending sleeve 15 in which an eraser 16 is inserted. The plug 14. has ribs 17 formed thereon and these ribs are slotted to receive cutters 18 which have the tapering saw tooth edges 19 to form the necessary cutters for removing the wood from the point of a pencil. The ribs 17 and cutters 18 may be grooved as at 20 to permit the shell 12 being clenched therein as shownat 21 to prevent the separation of the two parts.-

In the modified form shown in Fig. 3, the several parts are as follows: 10 indicates the pencil, 11 the shell enlarged as at 12 and the enlarged portion receives one end of the plug 1 1 from which extends the tin bular portion 15 to receive an eraser 16'.

-The plug 14 has ribs 17 formed thereon and these ribs support cutters 18 which are sharpened as at .19. The ribs 17 and cutter 18 are grooved as at 20 and the shell 12 is depressed as at 21 into the grooves 20. plug 16 instead of two pieces of material as shown in Fig. 2 in which the plug 22 serves only to receive the exposed end of the pencil.

Fig. 1 of the drawing is a cross 'sectional View through the sharpener showing four cutting elements and Fig. 5 is a similar view showing three cutting elements andit is thought that these suggestions imply that any number of cutters may be used efliciently.

Various modifications may be made within the scope of .the appended claim without departing fromthe spirit of this invention and the drawings are submitted for illus 'trative purposes only.

Having thus described my lnvention, I claim In an article of the class described, a shell, a reduced sleeve extending from one end of said shell to direct the course of a pencil in said shell, a fluted portion of said shell, a plug non-rotatably carried in the fluted portion of said shell, a sleeve extending from This figure shows a single eraser orsaid plug, an elastic cushion and eraser carried by said sleeve on said plug, slotted ribs formed on said plug, said ribs being grooved circumferentially, said shell being clenched in the grooved portions of said ribs, said fluted portion of said shell conforming with the ribbed portion of said plug, cutters disposed in said slotted ribs, said cutters hav- 7 ing saw tooth and tapering cutting edges and said elastic cushion serving to protect 10 the protruding end of a pencil from said cutters.

In testimony whereof I aflix my signature in presence of two witnesses.

SYLENA A. DUNCAN. Witnesses:

MARY E. SULLIVAN, LoUIs LEVIEW. 

